The Gaia Baby Serena Mini Cot Bed Extension in White will extend the life of your Serena Mini Cot up to 5 years with this cot bed conversion kit. Grow your Serena Mini Cot from 90cm to a 140cm long Cot Bed. With the extension kit you will have the option to use the bed as cot bed (2-3yrs), toddler bed (3-4yrs) or first bed/child bed (4-5 years).